Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual produção teve Rex Robbins como Herbie?
 ###Tabelas: CREATE TABLE best-selling_albums (best-selling_albums_id AUTO_INCREMENT PRIMARY KEY, No. INT, Album VARCHAR, Artist VARCHAR, Record label VARCHAR, Released VARCHAR, Chart peak INT, Number of times certified platinum VARCHAR) CREATE TABLE iran (iran_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Venue VARCHAR, Result VARCHAR, Competition VARCHAR, Goals INT) CREATE TABLE stage_casts (stage_casts_id AUTO_INCREMENT PRIMARY KEY, Productions VARCHAR, Rose VARCHAR, Louise VARCHAR, Dainty June VARCHAR, Herbie VARCHAR, Director VARCHAR) CREATE TABLE team_distribution (team_distribution_id AUTO_INCREMENT PRIMARY KEY, Round VARCHAR, Clubs remaining INT, Clubs involved INT, Winners from previous round VARCHAR, New entries this round VARCHAR, Leagues entering at this round VARCHAR) CREATE TABLE belmont_stakes_feature_key_prep_races_list (belmont_stakes_feature_key_prep_races_list_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Track VARCHAR, Race VARCHAR, Distance VARCHAR, Surface track VARCHAR, Winning horse VARCHAR, Winning jockey VARCHAR)  
SELECT Productions FROM stage_casts WHERE Herbie = rex robbins